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Tag: Pollution

Sulphur emissions
Soil degradation is a key global environmental indicator. Trans-border pollution in Europe has become a serious international and environmental problem. Sulphur emissions from industry in Eastern Europe is one of the mo...
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Human influences on the atmosphere during the industrial era
In many of the world’s largest cities (Beijing, Calcutta, Mexico City, Rio de Janeiro, etc.) WHO World Health Organization) air quality guidelines are not met. In 1996 global emissions of carbon dioxide were nearly four ...
29 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Comparison of global river nitrogen export from natural ecosystems, agricultural systems, and sewage effluents, 1975 and 1990
Nutrient loading is projected to become an increasingly severe problem, particularly in developing countries. Nutrient loading already has major adverse effects on freshwater ecosystems and coastal regions in both indust...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Reactive nitrogen on earth by human activity, with projection to 2050
The range of the natural rate of bacterial nitrogen fixation in natural terrestrial ecosystems (excluding fixation in agroecosystems) is shown for comparison. Human activity now produces approximately as much reactive ni...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
How the comb-jelly (Mnemiopsis leidyi) is spreading through European seas (invasive species)
The most threatening event for the Caspian ecosystem was the arrival of the North American comb jelly (Mnemiopsis leidyi). It was brought accidentally to the Caspian in the ballast water of oil tankers. Invasive and alie...
21 May 2010 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Polar bear sub-populations and pollution
There are thought to be between 20,000 and 25,000 bears in the world, which occur in19 relatively discrete sub-populations, some of which are shared between nations. Topping the food chain in the Arctic, the polar bear i...
13 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Mercury levels in indigenous women
Many POPs (persistent organic pollutants) and heavy metals from emissions further south are accumulated in Arctic food chains and ultimately in indigenous peoples. While fear of these compounds sometimes has resulted in ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Pathways of contaminants to the Arctic
Many POPs (persistent organic pollutants), heavy metals and other contaminants from emissions further south are accumulated in Arctic food chains and ultimately in indigenous peoples. This process is often referred to as...
17 May 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Environmental threats in the Barents Region
The Barents region is in the Arctic and covers the area of Western Russia and the northern areas of Finland, Sweden and Norway. This map indicates the political boundaries and economic areas in the region. More important...
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Arctic Russia under the threat of radioecologic pollution
Shows Arctic Russia under the threat of radioecologic pollution and the White and Kara Seas, Kola and Novaya Zemlya.
21 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
The disappearance of the Aral Sea
The demise of the Aral Sea in central Asia was caused primarily by the diversion of the inflowing Amu Dar’ya and Syr Dar’ya rivers to provide irrigation water for local croplands. These diversions dramatically reduced th...
26 Jan 2009 - by GRIDA
Benefits of marine and coastal ecosystems to human wellbeing
Besides the well-known economic value of fisheries, there are several other activities generating significant revenues in coastal and marine areas. Tourism has become one of the world’s fastest growing industries, provid...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
Fish diversity in freshwater systems
Although freshwater ecosystems such as rivers, lakes and wetlands occupy less than 2% of the earth’s total land surface, they provide a wide range of habitats for a significant proportion of the world’s plant and animal ...
26 Jan 2009 - by Philippe Rekacewicz
Biological oxygen demand - BOD: 1976-2008
The availability of oxygen is one of the most important indicators of the condition of a water body, because dissolved oxygen, or DO, (the amount of oxygen dissolved in water) is necessary for most aquatic organisms, inc...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
When the city harms its own water resources
In areas where surface water is not readily available (located far from areas of need), groundwater is the primary water source. Groundwater aquifers supply an estimated 20% of the global population living in arid and se...
01 Oct 2009 - by Philippe Rekacewicz
The WWF living planet index for freshwater
'The over-exploitation and mismanagement of fisheries, particularly when combined with other man-made stresses, can lead to the collapse of regional fish faunas. In many countries, aquaculture is rapidly increasing in re...
26 Jan 2009 - by GRID-Arendal
Transboundary water governance - averting conflict
Most governments recognize that violence over water is seldom strategically workable or economically viable and the most hostile enemies have a capacity for cooperation where water is concerned. The institutions that the...
26 Jan 2009 - by GRID-Arendal
Biodiversité, par rapport à l’abondance des espèces avant les impacts anthropiques
Déperdition de la biodiversité du fait de l’expansion agricole continue, de la pollution, du changement climatique et du développement des infrastructures.
08 Jun 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
Sources of water for domestic use in Port Harcourt
The main source of water in Port Harcourt is boreholes, which account to about 50 per cent of the water sources for domestic use. Many of these boreholes are shallow, making them prone to pollution, and increasing the ri...
18 Mar 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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